package com.sky.aspect;


import com.sky.annotation.AutoFill;
//import jdk.internal.classfile.MethodSignature;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.springframework.stereotype.Component;
import org.aspectj.lang.reflect.MethodSignature;

import java.lang.reflect.Method;
import java.time.LocalDateTime;

//自定义切面
@Aspect
@Component
@Slf4j
public class AutoFillAspect {



    @Pointcut("execution(* com.sky.mapper.*.*(..))&& @annotation(com.sky.annotation.AutoFill)")
    public void autoFillpointCut(){

    }


    @Before("autoFillpointCut()")
    public void autoFill(JoinPoint joinPoint){
        log.info("开始进行公共字段自动填充...");


        //获取当前被拦截的方法上的数据库操作类型
        MethodSignature signature=(MethodSignature) joinPoint.getSignature();//方法签名对象
        AutoFill autoFill=signature.getMethod().getAnnotation(AutoFill.class);//获得方法上的注解对象
        OperationType operationType = autoFill.value();//获得数据库操作类型

        //获得到当前被拦截方法的参数--实体对象
        Object[] args = joinPoint.getArgs();
        if(args==null || args.length==0){
            return;
        }
        Object entity =args[0];
        //准备赋值的数据
        LocalDateTime now=LocalDateTime.now();
        Long currentId = BaseContext.getCurrentId();


        //根据当前不同的操作类型，为对应的属性通过反射来赋值
        if(operationType==OperationType.INSERT){
            try {
                Method setCreateTime = entity.getClass().getDeclaredMethod("setCreateTime",LocalDateTime.class);
                Method setCreateUser=entity.getClass().getDeclaredMethod("setCreateUser",Long.class);
                Method setUpdateTime = entity.getClass().getDeclaredMethod("setUpdateTime", LocalDateTime.class);
                Method setUpdateUser = entity.getClass().getDeclaredMethod("setUpdateUser", Long.class);

                //通过反射为对象属性赋值
                setCreateTime.invoke(entity,now);
                setCreateUser.invoke(entity,currentId);
                setUpdateTime.invoke(entity,now);
                setUpdateUser.invoke(entity,currentId);

            }catch (Exception e){
                e.printStackTrace();
            }

        }else if(operationType==OperationType.UPDATE){

            try {

                Method setUpdateTime = entity.getClass().getDeclaredMethod("setUpdateTime", LocalDateTime.class);
                Method setUpdateUser = entity.getClass().getDeclaredMethod("setUpdateUser", Long.class);

                //通过反射为对象属性赋值

                setUpdateTime.invoke(entity,now);
                setUpdateUser.invoke(entity,currentId);

            }catch (Exception e){
                e.printStackTrace();
            }

            
        }







    }

}
